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Longman Dictionary of Contemporary English
cesium
noun
EXAMPLES FROM CORPUS
▪ During irradiation, food is exposed to gamma rays from sources such as cobalt 60 or cesium 137.
▪ The definition of a second has since officially been the time it takes a cesium atom to make 9,192,631,770 vibrations.
The Collaborative International Dictionary
cesium

cesium \cesium\ n. the chemical element of atomic number 55. It is a univalent element, the most electropositive metal. Symbol Cs; atomic weight 132.905. IT has a melting point of 28.4[deg] C.

Syn: caesium, Cs.

Douglas Harper's Etymology Dictionary
cesium

also caesium, rare alkaline metal, 1861, coined by Bunsen and Kirchhoff in 1860 in Modern Latin (caesium), from Latin caesius "blue-gray" (especially of eyes), in reference to the two prominent blue lines in its spectrum, by which it was first identified.

Wiktionary
cesium

n. (context US English) (alternative spelling of caesium English)

WordNet
cesium

n. a soft silver-white ductile metallic element (liquid at normal temperatures); the most electropositive and alkaline metal [syn: caesium, Cs, atomic number 55]

Wikipedia

Usage examples of "cesium".

TNT to explode a couple of ounces of cesium, sir, and the fallout would spread a minimum of sixty square blocks.

Odessa who brokered their deal with the North Korean for the cesium and the North Korean missile launcher.

The cesium had dispersed over a wide area covered with snow and ice that would melt into streams and rivers and flow eventually to the bay and the sound.

He took the cesium slug out of his pocket and put it into a tool that stripped it of statglass film and held it ready for the correct moment in the reconstruction process.

A group of childless protectors had carved it out with solar mirrors and built into it a small life-support and controls system, a larger frozen-sleep chamber, a breeder atomic pile and generator, a dirigible ion drive, and an enormous cesium tank.

They might refuel their cesium tanks, they might even build a plutonium-producing technology in the time they had left, but to find and reach another Pak-like worldno.

The cesium ion-engine, powering fifty million spacecraft, for instance.

There was cesium in Africa, beryllium in South America, but who knew when some cockeyed revolution would cut off the supply?

There was no blaze of light as he blasted out of his parking orbit, just the invisible cloud of ions from the cesium engine.

Cesium oscillators, hydrogen masers, satellites, and synchronizers opened an unlikely door to wonder - one which led him to relativity, radioactivity, and nuclear science.

So we built what I call a tetrode, a shielded grid tube, and then I switched from potassium to cesium oxide.

After twelve minutes, the cesium clocks of projected time and real time dropped to the single digits, whereupon the spectrograph, tracking the exhaust flame of the lander, went blank and after a row of zeros displayed the last, classic word: Brennschluss.

By now, other chelates existed which had special affinities for iodine, cesium, strontium, calcium.

We study the mutation rate of Clethrionomys glareolus, whom you'll meet, and sample the dose rates of cesium and strontium from a variety of mammals.

The original outer satellites are still there, their atomic batteries and cesium clocks ticking faithfully away though their computers have long crashed.